value	unc_up	unc_lo	author	ref	method
1.1800e+19	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
3.6111e+18	1.7333e+18	1.7333e+18	Fienga	INPOP19a	Ephem
4.3000e+18	4.7300e+18	4.7300e+18	Zielenbach	2011AJ....142..120Z	Deflec
4.8600e+18	4.7600e+18	4.7600e+18	Zielenbach	2011AJ....142..120Z	Deflec